Something else I thought about that I forgot to mention. I started to wonder if Grandpa P's death wasn't just some random act of violence. I'm not sure what the timeline of his death is but I feel like it might have occurred before the Coronal's death. Had it been around the same time as the Coronal's death, I might have dismissed it more as an opportunistic killing since the Coronal isn't around to protect Percy and was killed by someone who was prejudice at him just being a mythical. However, I'm starting to think that maybe Percy was getting closer to the truth of the missing children if he was still investigating or was maybe deemed to know too much. While I don't think this will become a murder mystery or a vengeance story, I'm wondering if Percy was killed by Zezé. If Nini wasn't bed ridden, I'd suspect her as possibly having something to do with his death as well. Based on the feather memories, it seems possible for Nini and Zezé to conspire, even if Nini doesn't know Zezé's true identity.
There's also the possibility that Percy's death was an assisted suicide, knowing that he would never be able to find the hotel and thought that this might give Pedro a chance at finding it and at least making his life better. I don't really think this is likely.